Commit message edited by Gregory.
Comment below from Jonathan Li
On my system, /dev/input/event13 (evdev interface) and /dev/input/js0 (joystick interface) correspond to the DS3 on my system. User/group ownership are both root.
With /dev/input/event13 at 0640 and /dev/input/js0 at 0644 - SDL2 detects no pad, SDL1 detects a 19 button, 27 axis pad
With /dev/input/event13 at 0666 and /dev/input/js0 at 0644 - Both SDL1 and SDL2 report a 19 button, 4 axis pad.
SDL2 only uses the evdev interface, SDL1 uses the evdev interface but if that fails, it uses the joystick interface.
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